Virgin asked Balch to confirm she had booked assistance and promised to investigate the matter.

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A spokesman told Huffington Post UK: "We’re really sorry that Vicky had this experience which is completely unacceptable. We’re looking into it as a matter of urgency and will also be taking it up with Network Rail, who provide the disability assistance at Euston.

"We’ve offered Vicky a pair of free first class tickets to a destination of her choice whilst we investigate this.”

The Virgin Trains website states: “We make sure everyone who’d like assistance during their journey gets all the help they need. Whether you book in advance or not, we’re there to help. But, letting us know your needs in advance can help us make sure you have a hassle-free journey.”